Re: [PATCH] x86/vdso: Emit a GNU hash

[Andy Lutomirski]

On Fri, Aug 7, 2015 at 9:10 AM, Nathan Lynch <Nathan_Lynch@xxxxxxxxxx> wrote:
> On 08/06/2015 05:52 PM, Andy Lutomirski wrote:
>> [adding lots of cc's]
>>
>> On Thu, Aug 6, 2015 at 2:45 PM, Andy Lutomirski <luto@xxxxxxxxxx> wrote:
>>> From: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
>>>
>>> Some dynamic loaders may be slightly faster if a GNU hash is
>>> available.  Strangely, this seems to have no effect at all on the
>>> vdso size.
>
> FWIW, I see arch/x86/entry/vdso/vdso64.so increase by 168 bytes here,
> using GCC 4.9.2, Binutils 2.24 as packaged by Fedora 21.
>
> I see a similar increase when I make the equivalent change for ARM.
>
>

At least on my configuration, that doesn't push it across a page
boundary, so it doesn't really matter.

--Andy
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